Reinforced concrete construction.



s. BUBRUWES.

BENFI?.01315y CONCRETE CONSTRUCTION.

unicum! 2mm MAY a, wos,

Patented Mar.29,1 910.

i UNITED @refine {LQ/ CANADA.

REINFQBCED CNCRETE CQ'NS'E'UCTEGN.

concrete reinforcements as described in the The inveni'ion consists essentially in thel novel arrangement of a plnraliiiy of flat bars or strips olf metal, wherebyv the Sectional aren merel is distributed in proportion "ro the strains io which die reinforced member mayv be subjected, and wherebjT ihe sheer members form a coninnoas pari; with the tension members1 and lare r rranged at verying angles according io the nnure oi' l'he member.

AThe objeeis of l'he invention are to devise :i reinforcement for eoneree Sfrncures, Whieli ma;7 be disposed economically in vn,- rions :forms of Aelructnres with seientiiie aecnrney, to add die greaest Sueaining strength to ihe Structure., io eliminarlo the neeess' y of special machinery in i'he formol'ion of the reinibreing` members, to eliminate all joints in the Said members, and io provide a reinforcement of cheap construction not readily injnred in iransporlnlion.

l'n the drawings Figure l is n pcrepeetire View ol" my reinlorreineniA adapted to a plain Form of beam. Fig. Q in n sectional View showing the arrangeinens of the reinforcing members for an arch. Fig, 3 1s a sectional View showing ilie adapl'alion of my form of reinforeemem; to an zibuiment Wall. Fig. Ll is a seel'ional View showing' the arrangement ol? reiiriorcing members for a reriieal pole.

Like numerals or' reference indicare con responding parte in each iignre.

Referring to J(he drawings7 l. and L) are 1968. 51e-Tiel No 313,892?.

lower ci ie bene i dij/ shorter disiences 'imm lie eem he benin enel bound lo lie oher Sii bv die bends Q and 1the upwardly ben forming tbe sheer memi'iers enf i gee alf sniiable angl eo pons i'inro' e planes .fore held i rrete and iheir angz'uzir arran the lower and upper cliordh .respectively oi' a plain salrnight beam exlendnig bein/een and over the nprigbs 3- and 4.

is llie bollom Sirip of the lower rliord l having one end lnrned nl nvardly at (S.

T is ille Seeond sli-lp of the lower Chord l, extending* l'lierealong and ree'l1n} on [he iop thereof for the maior portion of nel lenitli and secured (o said lower sirip near rheends lhereoii by b nds 8 sur* rounding nella stripe. Ai ie stri-p 2" is benl;

upwardly beyond the bande 8 and et the end is doubler' over line nplnrned end i3 of 'he slirip 5. loch sneeeer,L e.' Strip 'of eine of shearing iendeney nt eeenxporrion er the beam, that is to npwzirdly extend ine; porlione l() oif lie renier Strip ifi ere almofsi'y perpendiei-ilri n .ri the eneeeecling porione :ire bent to grmilnnily ailypr-oeeli 'the horizoninl as; iheyleppi ach the po-ins of support so ihat fn'e mid e'ngnler poriions are disposed to uiiliee he full benefit of their iennile Siren in Supporting; `the beam end sni'iqtziniially righi. ongles to the linee oil Hearing eirains. The sueco/eelingj istrip@7 from lhe ende oli 'ihe'beem ini'i'ardly are bent parallel 'io ldie boiom srip i and `or rile end or 1.Ehe beam benty don'nrmrdlj,v and all of seid strips are bound lo 'ether and lo ihe iop upper esgrip 'l2 bj: die bands l5l. lt will rims be seen thaiY e beem reii'rforeemenl formed Willi rhe loner chord member having 'the greatest roes Sectional area in he cenier of the beam Where i'he grealesc tensile Sirengrh is required and rlnit 'the oren of die said. chord decreases toward the poinje of snpporff, 'while the upper chord member has ille leasl' croi ssoel'ional are: nl' liliecenier Where l'hre ie pralieally no ieneion. end the Qreal'esr Seelional eren over poins oi enlilorr. ibi mir'mnm ernenntof mei'al need lo giro the um nmountv of I@eppoi-t, 'The angg'niarljs' ,rugged sheer members: 'form a roniinuonf@y par'. "li ihe Wi ,ision nrembere und :ire theredra'wingr fgliroirgrh rho conomen end di 1pos iiion may be varied fnfeordingg to l'lie rerpiiremenlfi olE eaeh ramlienlar beam or srrneinre and all @ln-air i 1 rhone oi2 oompreeeion. laken by *die reinioreemeni.

ln i'lieliorn'i oi: beam shown in Fig'. l'lilie reini(ireemenl` is Shown extending overi'he Support 1l and ii will be rendily seen that the reniainingr porion oi the Seid reinforcemenl will be eonslrucled preeiseljvihe, Seine ae 'die span shon'mJjlhe sirips of metal e);-

endingl from one end of the benne ille rio 'tools are entirely dispensed with. The metal other Without a break. Any length of l beam may therefore be constructed.without t a joint of any kind in the reinforcing strips, the length only being limited by the length of material obtainable. The strips may be l joined however, if desired but it is preferable that they be all or one piece. The down-turned ends of the strips are all rigidly secured together by suitable bands llt l and the said ends may extend downward l any desired length in the upright supports t to form a secure anchor. Almost any form t of reinforcement desired may be formed-in t a similar manner to that described and on account of the tiexibility of the thin strips of metal they may be bent te any desired l shape. l

The arch construction shown in Fig. 2 is made up almost identically the same as for a straight beam, being curved to the arch as shown, and the shear members arranged to divide the structure into a number ot,l divisions equivalent .to the ordinary keystone and beveled stone formation ot arch.

ln the torni of reintorcei'nent shown in l Fig. i the strips of metal are formed in don bled lengths of increasing` length, said doul ble lengths being secured together by bands` i as shown and all the ends secured togetheaI at the bottom.

Reint'orcements constructed in the manner described, that is to say, with laminatedr members t'oruied ot continuous strips oi metal, may he easily made up where the t I -,-,tr1,leture is being erected and no stamping, i

shearing, punching or lorging is required f and consequently all special machinery and i strips used are ordinary strips ot commercial steel and may of course, be transported with ease and Without special care and moreover the same size of stock may be used for all forms 0r sizes of members and therefore mistakes cannot occur through misunderstandino of sizes of material to be used.

The "ornis, shapes and sizes of reinforce-- ments which may be devised are innumerable and it must be understood that the scope of the invention is not limited to the constructions shown, as the' essential feature is in forming the reinforcement of laminations of metal strips and arranging such strips to malte the sectional area of the reinforce proportional to the tensional and shearing strains in the structure. i

What I claimv as my invention is A concrete reinforcement, comprising, a plurality of thin flat strips of metal secured together by fiat metal bands and bent out- Wardly -in succession from said bands and forming a reinforcing member of gradually fdecreasing sectional area, said outwardly bent portions being again united and bound at their points of Juncture by itat bands encircling the fiat strips and forming a secondary. reint'orcinff member vof gradually increasing sectional` area, said secondaryreintorcing member being bent at its terminal 'end and connected to the first mentioned f member.

Signed at the city of Niagara Falls, in

Ontario, Dominion of Canada, this 16th day of April, 1908.

SDNEY BURROVES. Witnesses F. W'. GiurrrrHs, d'. B. HOPKINS. 

